Hubbard Glacier, Alaska

Glaciers are seldom known for the ability to travel quickly, but Hubbard Glacier has been regarded as the "Galloping Glacier" ever since it dammed Russell Fjord in 1986. The phenomenal one-day movement of the glacier, that caused the dam at the Russell Fjord, created a lake behind it and trapped many marine species.

Hubbard Glacier is the largest tidewater glacier on the North American continent. A tidewater glacier calves when giant pieces of ice crack off the head of the glacier and fall into the sea. The glacier stretches 76 miles into the sea at Yakutat Bay and Disenchantment Bay.